Producer & engineer not listed; the former might be Volker Straus. ‘Neptune’: Women of the John Alldis Choir.
N.B. The post I have embedded was added to YT five years ago.
New to me: Bernard Haitink’s London Philharmonic Holst Planets. Recorded March 1970 in Kingsway Hall for Philips (just a few days after the LPO had recorded this music in the same venue for Decca Phase 4 conducted by Bernard Herrmann).
